oh my god. it seems recently something called Tekkit Lite has been released. It uses minecraft 1.4.6 instead of 1.2.5 as a base, and has still practically everything that the old Tekkit used, plus more!!! :Q

By the way look at this mod: linky
It makes minecraft capable of generating worlds just like previous major versions of the game. Remember those awesome alpha mountains? Or beta's biomes? God dammit I hate the current biomes!!!!!!!! I tried generating a beta-like world and holy shit! I forgot mc worlds could be this nice!!

If Mono is up to he could set some worlds with old terrain generation in the server! Although i don't know what's really going on in it. : \ Where did all our old worlds go?